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Showing 1–24 of 61 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Malignant Neoplasm of Unknown Primary Clear all
Completed No phase listed Observational

Review of Molecular Profiling-Real Time Polymerase Chain Reaction (Rt-Pcr) in Unknown Primary Cancer

NCT00876408
View directory record Official record
Conditions
Unknown Primary Cancer
Interventions
Not listed
Lead sponsor
SCRI Development Innovations, LLC
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 3, 2013 · Synced Jun 25, 2026, 9:29 AM EDT
Completed Phase 2 Interventional Results available

A Vaccine (CDX-1401) With or Without a Biologic Drug (CDX-301) for the Treatment of Patients With Stage IIB-IV Melanoma

NCT02129075
View directory record Official record
Conditions
Cutaneous Melanoma, Melanoma, Melanoma of Unknown Primary, Mucosal Melanoma, Ocular Melanoma, Stage IIB Cutaneous Melanoma AJCC v6 and v7, Stage IIC Cutaneous Melanoma AJCC v6 and v7, Stage III Cutaneous Melanoma AJCC v7, Stage IIIA Cutaneous Melanoma AJCC v7, Stage IIIB Cutaneous Melanoma AJCC v7, Stage IIIC Cutaneous Melanoma AJCC v7, Stage IV Cutaneous Melanoma AJCC v6 and v7
Interventions
DEC-205/NY-ESO-1 Fusion Protein CDX-1401, Poly ICLC, Recombinant Flt3 Ligand
Biological · Drug
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
7
States / cities
Chicago, Illinois • New York, New York • Durham, North Carolina + 3 more
Source: ClinicalTrials.gov public record
Updated Nov 15, 2021 · Synced Jun 25, 2026, 9:29 AM EDT
Completed Phase 2 Interventional

Gemox as First and Second Line Therapy in Unknown Primary Cancer

NCT00353145
View directory record Official record
Conditions
Unknown Primary Neoplasms
Interventions
Gemcitabine (Gemox), Oxaliplatin, Questionnaire
Drug · Behavioral
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2010
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 1, 2012 · Synced Jun 25, 2026, 9:29 AM EDT
Completed Phase 1 Interventional

Genetic Analysis-Guided Dosing of FOLFIRABRAX in Treating Patients With Advanced Gastrointestinal Cancer

NCT02333188
View directory record Official record
Conditions
Adenocarcinoma of Unknown Primary, Adult Cholangiocarcinoma, Gallbladder Carcinoma, Gastric Adenocarcinoma, Malignant Gastrointestinal Neoplasm, Metastatic Pancreatic Adenocarcinoma, Pancreatic Adenocarcinoma, Stage III Ampulla of Vater Cancer, Stage III Pancreatic Cancer, Stage IIIA Gallbladder Cancer, Stage IIIA Gastric Cancer, Stage IIIB Gallbladder Cancer, Stage IIIB Gastric Cancer, Stage IV Ampulla of Vater Cancer, Stage IV Gallbladder Cancer, Stage IV Gastric Cancer, Stage IV Pancreatic Cancer
Interventions
Paclitaxel Albumin-Stabilized Nanoparticle Formulation, Leucovorin Calcium, Irinotecan Hydrochloride, Fluorouracil, Laboratory Biomarker Analysis
Drug · Other
Lead sponsor
University of Chicago
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
8
States / cities
Chicago, Illinois • Decatur, Illinois • Evanston, Illinois + 5 more
Source: ClinicalTrials.gov public record
Updated May 30, 2023 · Synced Jun 25, 2026, 9:29 AM EDT
Withdrawn Phase 2 Interventional

Phase-II Study of Lu177DOTATOC in Adults With STTR(+)Pulmonary, Pheochromocytoma, Paraganglioma, Unknown Primary, Thymus NETs (PUTNET), or Any Other Non-.GEP-NET.

NCT04276597
View directory record Official record
Conditions
Pulmonary Neuroendocrine Neoplasm, Pheochromocytoma, Paraganglioma, Thymus Carcinoid, Unknown Primary Tumors, Neuroendocrine Tumors, Neuroendocrine Skin Carcinoma, Neuroendocrine Breast Tumor, Neuroendocrine Carcinoma Metastatic, Neuroendocrine Neoplasm of Ovary
Interventions
177Lu-DOTATOC
Drug
Lead sponsor
Excel Diagnostics and Nuclear Oncology Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 9, 2023 · Synced Jun 25, 2026, 9:29 AM EDT
Recruiting Not applicable Interventional

Cancer Genetic Testing in Ethnic Populations

NCT04475640
View directory record Official record
Conditions
Breast Carcinoma, Carcinoma of Unknown Primary, Central Nervous System Carcinoma, Digestive System Carcinoma, Genitourinary System Carcinoma, Head and Neck Carcinoma, Malignant Brain Neoplasm, Malignant Female Reproductive System Neoplasm, Malignant Musculoskeletal Neoplasm, Malignant Solid Neoplasm, Skin Carcinoma
Interventions
Biospecimen Collection, Genetic Testing
Procedure · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
1,800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2028
U.S. locations
2
States / cities
Scottsdale, Arizona • Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Apr 1, 2026 · Synced Jun 25, 2026, 9:29 AM EDT
Completed Phase 2 Interventional

Irinotecan Followed By Fluorouracil and Leucovorin in Treating Patients With Stage III or Stage IV Colorectal Carcinoma (Cancer), Other Refractory Carcinoma, or Metastatic Adenoma (Cancer) of Unknown Primary Origin

NCT00004005
View directory record Official record
Conditions
Carcinoma of Unknown Primary, Colorectal Cancer, Unspecified Adult Solid Tumor, Protocol Specific, Unspecified Childhood Solid Tumor, Protocol Specific
Interventions
fluorouracil, irinotecan hydrochloride, leucovorin calcium, conventional surgery, radiation therapy
Drug · Procedure · Radiation
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
Up to 24 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2005
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 25, 2017 · Synced Jun 25, 2026, 9:29 AM EDT
Completed Phase 1Phase 2 Interventional

Radiation Therapy, Combination Chemotherapy, and Amifostine in Treating Patients With Head and Neck Cancer

NCT00003582
View directory record Official record
Conditions
Carcinoma of Unknown Primary, Head and Neck Cancer
Interventions
amifostine trihydrate, cisplatin, fluorouracil, paclitaxel, quality-of-life assessment, radiation therapy
Drug · Procedure · Radiation
Lead sponsor
University of Miami
Other
Eligibility
18 Years to 120 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1988 – 1996
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Dec 14, 2016 · Synced Jun 25, 2026, 9:29 AM EDT
Completed No phase listed Observational

Outcomes of FoundationOne Directed Therapy in Cancer of Unknown Primary

NCT02628379
View directory record Official record
Conditions
Neoplasms, Unknown Primary, CUP, Metastatic Disease, Poorly Differentiated Adenocarcinoma, Poorly Differentiated Carcinoma, Squamous Carcinoma Poorly Differentiated
Interventions
Not listed
Lead sponsor
Foundation Medicine
Industry
Eligibility
18 Years and older
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 9, 2018 · Synced Jun 25, 2026, 9:29 AM EDT
Completed Phase 2 Interventional

Irinotecan in Treating Patients With Advanced Neuroendocrine Tumors

NCT00004922
View directory record Official record
Conditions
Carcinoma of Unknown Primary, Neuroendocrine Carcinoma, Neuroendocrine Carcinoma of the Skin
Interventions
irinotecan hydrochloride
Drug
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2002
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 18, 2013 · Synced Jun 25, 2026, 9:29 AM EDT
Not listed No phase listed Observational

The PIONEER Initiative: Precision Insights On N-of-1 Ex Vivo Effectiveness Research Based on Individual Tumor Ownership (Precision Oncology)

NCT03896958
View directory record Official record
Conditions
Cancer, All Types, Cancer of Liver, Cancer of Stomach, Cancer of Head and Neck, Cancer of Rectum, Cancer of Kidney, Cancer of Esophagus, Cancer of Colon, Cancer Skin, Cancer of Cervix, Cancer, Metastatic, Cancer of Larynx, Cancer of Neck, Cancer of Lung, Cancer of Brain and Nervous System, Cancer of Vulva, Disseminated, Cancer of Pancreas, Sarcoma, GIST, Small-cell Lung Cancer, Adenocarcinoma Lung, Cancer of Prostate, Cancer, Advanced, Adrenal Cancer, Testicular Cancer, Uterine Cancer, Bronchoalveolar Cell Lung Cancer, Cancer Unknown Primary, Glioblastoma Multiforme, Oligodendroglioma, Breast Cancer, Renal Cell Carcinoma, Hepatocellular Carcinoma, Cholangiocarcinoma, Squamous Cell Carcinoma, Transitional Cell Carcinoma, Cancer, Other, Cancer, Anal, Melanoma, Cancer, Bile Duct, Cancer, Bladder, Cancer Cords Vocal, Cancers Cell Neuroendocrine, Cancer Differentiated Poorly, Cancer, Anaplastic Thyroid
Interventions
Not listed
Lead sponsor
SpeciCare
Industry
Eligibility
1 Month to 99 Years
Enrollment
1,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
1
States / cities
Gainesville, Georgia
Source: ClinicalTrials.gov public record
Updated Dec 3, 2020 · Synced Jun 25, 2026, 9:29 AM EDT
Completed Phase 3 Interventional

Radiation Therapy in Treating Patients With Metastases to the Lymph Nodes in the Neck From an Unknown Primary Tumor

NCT00047125
View directory record Official record
Conditions
Carcinoma of Unknown Primary
Interventions
radiation therapy
Radiation
Lead sponsor
European Organisation for Research and Treatment of Cancer - EORTC
Network
Eligibility
18 Years to 120 Years · Female only
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2002
U.S. locations
237
States / cities
Birmingham, Alabama • Huntsville, Alabama • Mobile, Alabama + 180 more
Source: ClinicalTrials.gov public record
Updated Jul 8, 2018 · Synced Jun 25, 2026, 9:29 AM EDT
Completed Phase 2 Interventional

Gemcitabine in Treating Patients With Metastatic Cancer of Unknown Primary

NCT00357630
View directory record Official record
Conditions
Carcinoma of Unknown Primary, Pain
Interventions
gemcitabine hydrochloride, quality-of-life assessment
Drug · Procedure
Lead sponsor
Eastern Cooperative Oncology Group
Network
Eligibility
18 Years to 120 Years
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2006
U.S. locations
37
States / cities
Chicago, Illinois • Decatur, Illinois • Hinsdale, Illinois + 24 more
Source: ClinicalTrials.gov public record
Updated Nov 1, 2020 · Synced Jun 25, 2026, 9:29 AM EDT
Completed Phase 1 Interventional

Irinotecan and Capecitabine in Treating Patients With Solid Tumors

NCT00003867
View directory record Official record
Conditions
Cancer
Interventions
capecitabine, irinotecan hydrochloride
Drug
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years to 120 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2003
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Sep 9, 2018 · Synced Jun 25, 2026, 9:29 AM EDT
Completed Phase 1 Interventional

Combination Chemotherapy Plus Filgrastim in Treating Patients With Advanced Solid Tumors

NCT00014456
View directory record Official record
Conditions
Bladder Cancer, Breast Cancer, Carcinoma of Unknown Primary, Esophageal Cancer, Gastric Cancer, Head and Neck Cancer, Lung Cancer, Melanoma (Skin), Ovarian Cancer, Pancreatic Cancer, Prostate Cancer, Sarcoma
Interventions
filgrastim, docetaxel, gemcitabine hydrochloride
Biological · Drug
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
18 Years and older
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2005
U.S. locations
1
States / cities
Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Aug 27, 2013 · Synced Jun 25, 2026, 9:29 AM EDT
Completed No phase listed Observational

Mass Response of Tumor Cells as a Biomarker for Rapid Therapy Guidance (TraveraRTGx)

NCT05461430
View directory record Official record
Conditions
Pleural Effusion, Malignant, Ascites, Malignant, Carcinoma, Carcinoma, Hepatocellular, Carcinoma, Renal Cell, Carcinoma, Renal, Carcinoma, Small Cell, Carcinoma, Non-Small-Cell Lung, Carcinoma, Pancreatic Ductal, Carcinoma, Neuroendocrine, Carcinoma, Thymic, Carcinoma, Pancreatic, Carcinoma Breast, Carcinoma, Ovarian, Carcinoma Bladder, Carcinoma of Unknown Primary, Carcinoma of the Head and Neck, Carcinoma of the Oropharynx, Carcinoma of the Larynx, Carcinoma of the Bladder, Carcinoma of Esophagus, Carcinoma of the Nasopharynx, Carcinoma of the Penis, Carcinoma of the Cervix, Carcinoma of the Anus, Carcinoma of the Vulva, Carcinoma of the Appendix, Carcinoma of the Oral Cavity, Cholangiocarcinoma, Melanoma, Mesothelioma, Pancreatic Cancer
Interventions
Not listed
Lead sponsor
Travera Inc
Industry
Eligibility
18 Years and older
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Oakland, California
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Jun 25, 2026, 9:29 AM EDT
Completed Phase 1 Interventional

Trastuzumab Plus R115777 in Treating Patients With Advanced or Metastatic Cancer

NCT00005842
View directory record Official record
Conditions
Cancer
Interventions
trastuzumab, tipifarnib
Biological · Drug
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2000
U.S. locations
2
States / cities
Fort Sam Houston, Texas • San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Feb 10, 2013 · Synced Jun 25, 2026, 9:29 AM EDT
Completed Phase 3 Interventional Results available

Gemcitabine/Irinotecan/ZD1839 vs Paclitaxel/Carboplatin/Etoposide/ZD1839 in Carcinoma of Unknown Primary Site

NCT00193596
View directory record Official record
Conditions
Neoplasms, Unknown Primary
Interventions
Etoposide, Gemcitabine, Irinotecan, Paclitaxel, Carboplatin
Drug
Lead sponsor
SCRI Development Innovations, LLC
Other
Eligibility
18 Years and older
Enrollment
198 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2009
U.S. locations
31
States / cities
Anniston, Alabama • Huntsville, Alabama • Mobile, Alabama + 28 more
Source: ClinicalTrials.gov public record
Updated May 2, 2013 · Synced Jun 25, 2026, 9:29 AM EDT
Completed Phase 2 Interventional Results available

Sintilimab in Cancer of Unknown Primary

NCT05024968
View directory record Official record
Conditions
Cancer of Unknown Primary Site
Interventions
Sintilimab
Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 24, 2026 · Synced Jun 25, 2026, 9:29 AM EDT
Completed Phase 2 Interventional Results available

Belinostat, Carboplatin and Paclitaxel (BelCaP) Compared to Carboplatin and Paclitaxel in Patients With Cancer of Unknown Primary

NCT00873119
View directory record Official record
Conditions
Carcinoma of Unknown Primary
Interventions
belinostat, carboplatin, paclitaxel, carboplatin, paclitaxel
Drug
Lead sponsor
Valerio Therapeutics
Industry
Eligibility
18 Years and older
Enrollment
89 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
11
States / cities
Fort Myers, Florida • Marietta, Georgia • Baton Rouge, Louisiana + 8 more
Source: ClinicalTrials.gov public record
Updated Jul 27, 2015 · Synced Jun 25, 2026, 9:29 AM EDT
Recruiting Phase 2 Interventional

A Phase 2a, Single-dose, Open-label Study to Evaluate Diagnostic Performance and Safety of Pegsitacianine, an Intraoperative Fluorescence Imaging Agent for the Detection of Cancer, in Patients With Unknown Primary Head and Neck Cancer (ILLUMINATE STUDY)

NCT05576974
View directory record Official record
Conditions
Head and Neck Cancer, Unknown Primary Cancer, Head and Neck Squamous Cell Carcinoma
Interventions
Pegsitacianine
Drug
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 99 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Apr 13, 2026 · Synced Jun 25, 2026, 9:29 AM EDT
Completed Phase 1 Interventional Results available

Pembrolizumab and Stereotactic Radiosurgery for Melanoma or Non-Small Cell Lung Cancer Brain Metastases

NCT02858869
View directory record Official record
Conditions
Metastatic Malignant Neoplasm in the Brain, Metastatic Melanoma, Mucosal Melanoma, Ocular Melanoma, Stage IV Non-Small Cell Lung Cancer, Stage IV Skin Melanoma, Melanoma of Unknown Primary
Interventions
Pembrolizumab, Stereotactic Radiosurgery
Biological · Radiation
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2023
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Mar 8, 2026 · Synced Jun 25, 2026, 9:29 AM EDT
Terminated Phase 1 Interventional

Stereotactic Radiosurgery and Immune Checkpoint Inhibitors With NovoTTF-200M for the Treatment of Melanoma Brain Metastases

NCT05341349
View directory record Official record
Conditions
Clinical Stage IV Cutaneous Melanoma AJCC v8, Melanoma of Unknown Primary, Metastatic Malignant Neoplasm in the Brain, Metastatic Melanoma, Metastatic Mucosal Melanoma, Metastatic Ocular Melanoma, Pathologic Stage IV Cutaneous Melanoma AJCC v8
Interventions
Ipilimumab, Nivolumab, Pembrolizumab, Stereotactic Radiosurgery, Tumor Treating Fields Therapy
Biological · Radiation · Procedure
Lead sponsor
Emory University
Other
Eligibility
22 Years and older
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Apr 22, 2026 · Synced Jun 25, 2026, 9:29 AM EDT
Active, not recruiting Phase 2 Interventional

Intensity Modulated Proton or X-Ray Therapy After Surgery for Treatment of Head and Neck Cancer, the HEADLIGHT Study

NCT05075980
View directory record Official record
Conditions
Head and Neck Carcinoma, Head and Neck Carcinoma of Unknown Primary, Hypopharyngeal Carcinoma, Laryngeal Carcinoma, Metastatic Malignant Neoplasm in the Lymph Nodes, Nasal Cavity Carcinoma, Oral Cavity Carcinoma, Oropharyngeal Carcinoma, Paranasal Sinus Carcinoma, Salivary Gland Carcinoma, Cutaneous Squamous Cell Carcinoma of the Head and Neck, Locally Advanced Cutaneous Squamous Cell Carcinoma of the Head and Neck
Interventions
Cisplatin, Intensity-Modulated Proton Therapy, Quality-of-Life Assessment, Questionnaire Administration, Computed Tomography, Magnetic Resonance Imaging, Positron Emission Tomography, Biospecimen Collection, Intensity-Modulated Radiation Therapy
Drug · Procedure · Other + 1 more
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
174 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2035
U.S. locations
9
States / cities
Phoenix, Arizona • Scottsdale, Arizona • Jacksonville, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Jun 25, 2026, 9:29 AM EDT